Who said "I must keep my true self hidden from the world."?

This quote is attributed to Dexter.

I must keep my true self hidden from the world. - Dexter

"I must keep my true self hidden from the world."

Dexter Truth

"What does this button do?"

"I must focus on my work."

"Science rules!"

"Dee Dee, get out of my laboratory!"

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."